123204122140221 has 10 divisors (see below), whose sum is σ = 184045663937982. Its totient is φ = 82136081426760.

The previous prime is 123204122140219. The next prime is 123204122140289. The reversal of 123204122140221 is 122041221402321.

123204122140221 is a `hidden beast` number, since 1 + 2 + 3 + 2 + 0 + 412 + 21 + 4 + 0 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 70799350635225 + 52404771504996 = 8414235^2 + 7239114^2 .

It is not a de Polignac number, because 123204122140221 - 2¹ = 123204122140219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123204122147221) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 760519272390 + ... + 760519272551.

Almost surely, 2^{123204122140221} is an apocalyptic number.

It is an amenable number.

123204122140221 is a deficient number, since it is larger than the sum of its proper divisors (60841541797761).

123204122140221 is an equidigital number, since it uses as much as digits as its factorization.

123204122140221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521038544953 (or 1521038544944 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

Adding to 123204122140221 its reverse (122041221402321), we get a palindrome (245245343542542).

The spelling of 123204122140221 in words is "one hundred twenty-three trillion, two hundred four billion, one hundred twenty-two million, one hundred forty thousand, two hundred twenty-one".